abs please help

can anyone tell me if 2006 has abs on all 4 wheels. friend has light on and no abs. she had a shop do rear brakes and now abs do not work. I haven't looked at it yet but am thinking they messed something up. They also replaced tranny and maybe did something in the front. They said something about replacing a pump for $800 would fix it. what pump? abs is electrical right. Thanks for replies in advance.

Yes, the Caravan/Voyager has 4-wheel anti-lock brakes. The pump they are refering to is the pump/motor that provides the ABS operation. A trouble code is stored if the ABS light is on. Find out what the code is and post it.

location? on axle in rear